thumb|175px|Antonio Sacchetti; woodcut by (1870) Antonio Sacchetti (8 January 1790, Venice – 15 April 1870, Warsaw) was a Republic of Venice-born scenic designer and painter who spent most of his car
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6eca4bac6950df9fff615274778af078e474be0c94fa226064e0d1e7ec9e961. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91d1d7ea-993a-44f4-b631-6f2895437227.json and https://artists.proofprofile.net/proofs/artist/91d1d7ea-993a-44f4-b631-6f2895437227.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La fanciulla del West: Act II: Una parola sola
Orchestra Sinfonica Nazionale della RAI di Torino
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63663326eb9841fbd5651bb7beb3ac66ed377c1990bf3a32f8cee0057fefb3a4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1520852.
La fanciulla del West: Act II: Or son sei mesi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa393aac5b7fad93a62958195c91da01da0bee32810f43eedc6b32e2e9d011e8b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1520853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3131e2aa2eb41f10e63bbd34eb659eca312cae3021d646d8c851ff0cb4bc7142. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1520883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1e6bfa98270f6b7ac4709d357ada68dc892b3cc3d6f432ab170bc83481b5e7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1520855.
Adriana Lecouvreur: Act I: La dolcissima effige
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2f09ac9f59bb3b3b8e9d56897e77d6d73d714f0c8800053ace568cf989670d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1520856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48385908c61e912783f6228477ac1e696eaf628b2fb7439da89abc643fb5aeaf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1520886.
La favorita, Act I: Una vergine, un'angel di Dio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42014b3eeae5cd93bb1c7e7cb4782bf1d60c0f51e77692ab3fa4c130249f07c2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1520858.
I Lombardi alla prima crociata, Act II: La mia letizia infondere
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec05376a1a4300702853933e253097e02fa68c449e47e351247caa919f6ee9a2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1520864.
Un ballo in maschera: Act III: Ma se m'e forza perderti
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34a07ff75b32d595110ca81da51cc3ca1e881da45787b94d4be66396588253c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1520867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f910d7902922cd20ff87b99654fc1f0e2eb41a94816b53603665793e537c81. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1520868.
La forza del destino: Act III: La vita e inferno all'infelice
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eef3ef91038336534c79e5df1208266a9d43afa648b44ef72a4a3b1998553a8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1520869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959e92cff91cadaf243f47c746308463a568c9de2ee152b9f68820f71e0fe9c9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USB8U1520877.
La traviata / Act 3: "Parigi, o cara, noi lasceremo"
Orchestra dell'Accademia Nazionale di Santa Cecilia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3869082d3d9d1c78e13a88ed02eedf8c146f2aafe12a04a846ab759a350c869a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF075440909.
La Wally / Act 1: "Ebben? Ne andrò lontana"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b4a43ab99f46b4078ad1a3ca7fca89715117aa754a5103ed94e9fc48d77f16. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076840709.
Adriana Lecouvreur / Act 1: "Ecco, respiro appena...Io son' l'umile ancella"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ea1171e3d4167d11d68054970643d1663d5c1c38a4568264e5a74be49a5e69. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF075510290.
Puccini: Manon Lescaut (Recorded 1952-1956)
Puccini: Madama Butterfly, Act 1: "Quanto cielo!" - "Ancora un passo or via" (Coro, Butterfly, Sharpless)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ff833456a64a21f9fe8899d5e7cb7cd637a6bd4a153c6df2f5b710e271d15d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC5900289.
Puccini: Madama Butterfly, Act 1: "Viene la sera" (Butterfly, Pinkerton, Suzuki)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8baf0ce8278e2210731d9a8ed550f3a634c8066de7542fcca9ab9bc801edf4fb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC5900295.
Puccini: Madama Butterfly, Act 2: "Un bel dì vedremo" (Butterfly)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf2bca63a2710fe841131a0b2064621ca76a574fb21af36507e00a2fe359b64. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC5900300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be4afbb12444f5d3bd1d3b83487a685361beb5af11619897382560b9e920ad5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF075940108.
La Bohème / Act 2: "Quando m'en vo'" (Musetta's Waltz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7df4bd00f69765f3f7a8c17fae058e48e5ba6d219c968e320f2135df1f67437. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF075940115.
Puccini: Madama Butterfly (Stereo Version)
Puccini: Madama Butterfly (Mono Version)
Verdi: La traviata, extraits (Mono Version)